diff --git a/setup.py b/setup.py
index 73c9c4061..dd97ac112 100644
--- a/setup.py
+++ b/setup.py
@@ -239,6 +239,9 @@ def run(self):
 if BUILDING_FOR_WINDOWS:
 
     class Distribution(_Distribution):
+        def has_c_libraries(self):
+            return not has_system_lib()
+
         def is_pure(self):
             return False